Sliding Joint Elastic Module for Motion Assistance
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Solution Overview
Problem
Existing motion assistance apparatuses do not effectively address the varying needs of users with joint problems, particularly in providing adjustable support and stability for different joint positions and movements.
Innovation Solution
A supporting module with a sliding joint, elastic module, and adjustable frame that includes a constant force spring and opposing elastic members to maintain the sliding joint at the center of the guide, along with a slider and hanging portion for secure attachment and detachment, allowing for variable length adjustments and three degrees of freedom motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sliding joint structure is used to provide adjustable support, then adaptability to different joint positions is improved, but stability and force distribution deteriorate
Solution Approach 1:
The elastic module acts as a counterbalancing mechanism that provides a restoring force to oppose the weight and external forces applied to the sliding joint. This counterbalancing action maintains stability while allowing the joint to move to different positions, resolving the contradiction between adaptability and stability.
Solution Approach 2:
The elastic module changes its elastic force parameters based on the position of the sliding joint along the sliding guide. By adjusting the elastic force dynamically as the joint moves, the system maintains optimal stability at each position while preserving adaptability across the full range of motion.
2Force
If a constant force spring is used to maintain position, then force distribution is improved, but device complexity increases
Solution Approach 1:
The elastic module combines multiple functional elements (spring mechanism, guiding structure, and positioning system) into a single integrated component. This merging reduces the overall device complexity while maintaining the constant force distribution function across the sliding joint's range of motion.
3Reliability
If elastic members are added to provide elastic force, then support stability is improved, but device complexity increases
Solution Approach 1:
The elastic module serves multiple functions simultaneously: it provides elastic force for stability, guides the sliding joint along the correct path, and maintains constant force distribution. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while improving support stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides stable and adjustable support for users, accommodating different joint positions and movements, enhancing user comfort and mobility by ensuring proper alignment and force distribution, even when external forces are applied.
Implementation Method 1
an elastic module provided in the supporting frame, and configured to provide an elastic force to the sliding joint
Implementation Method 2
The elastic module may include a constant force spring configured to provide a constant force to the sliding joint, irrespective of a change in a position of the sliding joint
Data Source
AI summary
A supporting module and a motion assistance apparatus including the same, the supporting module including a supporting frame including a sliding guide, a sliding joint configured to slide along the sliding guide, and an elastic module provided in the supporting frame, and configured to provide an elastic force to the sliding joint, are provided.